• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
Tech

Facebook has secretly been draining your phone battery to test features, former Meta employee claims

By
Alice Hearing
Alice Hearing
Down Arrow Button Icon
By
Alice Hearing
Alice Hearing
Down Arrow Button Icon
January 31, 2023, 8:09 AM ET
The application apps Facebook and Messenger is seen on the display of an iPhone.
Ex-employee George Hayward said he was fired for refusing to take part in “negative testing.”Silas Stein—picture alliance via Getty Images

Facebook has been draining users’ phone batteries without their consent, according to an ex-employee, who claims he was fired for refusing to comply with the practice. 

Facebook parent Meta has been using “negative testing” for over five years, according to data scientist George Hayward, 33, who started working on the Messenger app in October 2019. 

In a now withdrawn lawsuit filed on Jan. 20, Hayward said he had seen an internal document titled “How to run thoughtful negative tests,” which laid out details of the practice and examples leading back to 2016. 

That document indicates that Meta has been using “negative tests” across its platforms, which have around 2.96 billion users according to recent reports. They are used to “measure impact” by testing new features, and by measuring how quickly the app runs, how images load, and how news feed scrolls perform. 

When asked to participate, Hayward said he refused out of concern for the risks involved in depleting users’ power, especially in cases when they have to communicate with others, like emergency services.

Hayward’s lawyer Dan Kaiser maintained that negative testing is not legal in New York, according to the New York Post, saying that it violates a law that prohibits damaging someone’s property without their consent. 

“It’s clearly illegal,” Kaiser said. “It’s enraging that my phone, that the battery can be manipulated by anyone.”

Negative testing concerns shut down

The ex-employee said he doesn’t know how many people have been affected by the tests, but that when he expressed this to his supervisor at the time, his concerns were pushed to the side. 

“It turns out if you tell your boss, ‘No, that’s illegal,’ it doesn’t go over very well,” Hayward told the New York Post. 

“I said to the manager, ‘This can harm somebody,’ and she said by harming a few we can help the greater masses.” 

According to the suit, Hayward noticed retaliation including low performance ratings, reviews that were canceled and then rescheduled, and the assignment of responsibilities that set him up for failure. 

He was fired in November, which coincided with Meta’s recent mass layoffs. However, his lawyers argue that this was no coincidence. 

The lawsuit, filed in Manhattan, has now been withdrawn because of Meta’s internal arbitration clause. However, Hayward stands by his allegations, his lawyer told the Post. 

A Meta spokesperson told Fortune: “Mr. Hayward’s claims are without merit.” 

Learn how to navigate and strengthen trust in your business with The Trust Factor, a weekly newsletter examining what leaders need to succeed. Sign up here.
About the Author
By Alice Hearing
See full bioRight Arrow Button Icon

Latest in Tech

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Leadership
  • Success
  • Tech
  • Asia
  • Europe
  • Environment
  • Fortune Crypto
  • Health
  • Retail
  • Lifestyle
  • Politics
  • Newsletters
  • Magazine
  • Features
  • Commentary
  • Mpw
  • CEO Initiative
  • Conferences
  • Personal Finance
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Tech

bytedance
AIHollywood
Top Hollywood screenwriter warns TikTok’s new tool is at the gates: ‘I hate to say it. It’s likely over for us’
By Barbara Ortutay and The Associated PressFebruary 16, 2026
10 hours ago
ring
LawAmazon
Amazon’s Ring decides maybe partnering with a police surveillance firm is a bad idea after wide revulsion at Super Bowl ad
By The Associated PressFebruary 16, 2026
11 hours ago
Brian Moynihan, chief executive officer of Bank of America Corp.
EconomyJobs
Brian Moynihan isn’t so worried about an AI jobs bloodbath, pointing to a 1960s theory that computers would end all management roles
By Eleanor PringleFebruary 16, 2026
12 hours ago
manyika
CommentaryScience
AI is transforming science – more researchers need access to these powerful tools for discovery  
By James Manyika and Demis HassabisFebruary 16, 2026
14 hours ago
Traders work on the floor of the New York Stock Exchange (NYSE) on February 13, 2026 in New York City.
InvestingMarkets
Trillion-dollar AI market wipeout happened because investors banked that ‘almost every tech company would come out a winner’
By Eleanor PringleFebruary 16, 2026
16 hours ago
Big TechChips
Rampant AI demand for memory is fueling a growing chip crisis
By Debby Wu, Takashi Mochizuki, Yoolim Lee and BloombergFebruary 15, 2026
1 day ago

Most Popular

placeholder alt text
Economy
Social Security's trust fund is nearing insolvency, and the borrowing binge that may follow will rip through debt markets, economist warns
By Jason MaFebruary 15, 2026
1 day ago
placeholder alt text
Future of Work
Malcolm Gladwell tells young people if they want a STEM degree, 'don’t go to Harvard.' You may end up at the bottom of your class and drop out
By Sasha RogelbergFebruary 14, 2026
3 days ago
placeholder alt text
Real Estate
A billionaire and an A-list actor found refuge in a 37-home Florida neighborhood with armed guards—proof that privacy is now the ultimate luxury
By Marco Quiroz-GutierrezFebruary 15, 2026
2 days ago
placeholder alt text
Success
Meet the grandmother living out of a 400-ft ‘granny pod’ to save money and help with child care—it’s become an American ‘economic necessity’
By Emma BurleighFebruary 15, 2026
2 days ago
placeholder alt text
Economy
A U.S. 'debt spiral' could start soon as the interest rate on government borrowing is poised to exceed economic growth, budget watchdog says
By Jason MaFebruary 14, 2026
2 days ago
placeholder alt text
Commentary
Something big is happening in AI — and most people will be blindsided
By Matt ShumerFebruary 11, 2026
6 days ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.